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dc.creatorĐonlagić, Jasna
dc.creatorŽugić, Dragana
dc.creatorPetrović, Zoran
dc.date.accessioned2023-02-01T10:01:44Z
dc.date.available2023-02-01T10:01:44Z
dc.date.issued2012
dc.identifier.issn0021-8995
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/5689
dc.description.abstractTwo series of nanoclay reinforced, thermoresponsive hydrogels were prepared, one based on poly(N-isopropylacrylamide) (PNIPA) and the other on semi-interpenetrating networks containing PNIPA and poly(N-vinyl pyrrolidone) (PVP), designated as SIPNs. The gels were crosslinked with 1, 3, and 5 wt % inorganic clay (hectorite) and SIPN gels additionally contained 1 wt % of PVP. The hydrogels were tested in the "as-prepared state," i.e., at 10 wt % PNIPA concentration in water and at equilibrium (maximum) swelling. Increasing the concentration of nanoclays increases crosslink density, modulus, tensile strength, elongation (except in equilibrium swollen gels), hysteresis and with decreases in the degree of swelling, broadening of the phase transition region, and a decrease in elastic recovery at high deformations. The presence of linear PVP in the networks increases porosity and the pore size, increases swelling, deswelling rates, and hysteresis, but decreases slightly lower critical solution temperature (LCST), tensile strength, elongation, and elastic recovery. The strongest hydrogels were ones with 10 wt % PNIPA and 5 wt % of nanoclays, displaying tensile strengths of 85 kPa and elongation of 955%. All properties of hydrogels at the equilibrium swollen state are lower than in the as-prepared state, due to the lower concentration of chains per unit volume, but the trends are preserved.sr
dc.language.isoensr
dc.publisherWiley Periodicals, Inc.sr
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172062/RS//sr
dc.rightsrestrictedAccesssr
dc.sourceJournal of Applied Polymer Sciencesr
dc.subjectmechanical propertiessr
dc.subjectnanocompositesr
dc.subjectsemi-interpenetrating networks (semi-IPNs)sr
dc.subjectswelling/deswelling kineticssr
dc.subjectthermosensitive hydrogelssr
dc.titleHigh strength thermoresponsive semi-IPN hydrogels reinforced with nanoclayssr
dc.typearticlesr
dc.rights.licenseARRsr
dc.citation.epage3036
dc.citation.issue4
dc.citation.rankM22
dc.citation.spage3024
dc.citation.volume124
dc.identifier.doi10.1002/app.35334
dc.identifier.scopus2-s2.0-84856760508
dc.identifier.wos000299947100041
dc.type.versionpublishedVersionsr


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Приказ основних података о документу